Mechanical Stress Induces Remodeling of Vascular Networks in Growing Leaves
Fig 7
Model with randomness in vein thickness and threshold in the growth law.
All panels show the stress-dependent distribution of non-affinity index q in all the simulations for a noise amplitude of r = 40%. (A) With no growth threshold (η = 0) the distribution in the presence of anisotropic stress (red) is wider than without it (blue), in contrast to experimental finding (Fig 6C). (B) When a threshold, η = η0, is introduced, the trend is reversed, and the stressed tissue features a narrower distribution, in agreement with experiments. (C,D) Sensitivity of the results to the threshold; the normalized threshold η⋆ = η/η0 ranges from 0.1 to 1.3. Panels (C) and (D) correspond, respectively, to σx = 0 and σx = 2Ptur.